Prabhupāda: A first class devotee of the Lord never asks for anything from the Lord. He is always ready to offer something to the Lord – oh Lord! Take whatever I possess from me. pranair arthair dhiya vaca (SB 10.22.35), take my life, my wealth, and my words, and my intelligence. This is the sentiment of a pure devotee. Just like the Pandavas, the Lord is present before them as a friend, Krishna. There kingdom was usurped, their family, wife was insulted, but you can see in the Mahabharata that they never prayed to the Lord that You are our friend and yet all this is happening with us. No! They never said like this! Never! The Lord is always with them but they never prayed to Him that remove our difficulties. This is the sentiment of a pure devotee.
And those who have not reached that stage yet are called pious. In future they will become pure devotees. Therefore it is a scriptural injunction that even if you have a material desire, even then perform devotional service.